no value in upgrading system deps, they are not persisted

.github/workflows/tests.yml

@@ -61,15 +61,7 @@ jobs:
             -t hjwp/obeythetestinggoat-book-tester:latest \
             bash -c "echo hello world"
 
-      - name: uv pip install --upgrade systemwide
-        run: |
-          docker run --rm \
-            --mount type=volume,source=rootmount,target=/root \
-            --mount type=bind,source=./,target=/app \
-            -t hjwp/obeythetestinggoat-book-tester:latest \
-            bash -c "uv pip install --system --upgrade ."
-
-      - name: uv create virtualenv in mounted /app folder at .venv
+      - name: uv create virtualenv in mounted /app folder at .venv and install latest/upgraded deps
         run: |
           docker run --rm \
             --mount type=volume,source=rootmount,target=/root \